This is mostly just Apple fixing the bonkers default security settings of a unix desktop. As devs we're used to the idea that, e.g., any app we run should be able to modify any files that belong to us, regardless of whether we asked it to. But that's actually an insanely lax security model.

It's honestly not hard to disable any security settings that are getting in the way. I run whatever software I like on my Mac, no problems.

People have been talking about how Apple were going to lock down Mac OS "real soon now" for at least a decade. There's no real indication that it's ever going to happen.